<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="../vue.js"></script>
</head>

<body>
  <div id="app">
    <!-- 先双向绑定表单数据 -->
    性:<input type="text" v-model = "firstName">
    名:<input type="text" v-model = "lastName">

    <!-- 拿到值 -->
    <p>姓名: {{firstName}} --- {{lastName}}</p>
  </div>
  <script>
    Vue.config.productionTip = false;
    
    const vm = new Vue({
      el: "#app",
      data() {
        return {
          firstName: '',
          lastName: ''
        }
      }
    })
  </script>
</body>

</html>